研究虫酰肼对甜菜夜蛾汰选种群生长发育及生殖的影响。结果显示：经虫酰肼处理后，甜菜夜蛾SS种群和RR种群卵的孵化抑制中浓度分别为179.38和160.71 mg/kg，孵化幼虫的存活抑制中浓度分别为18.64和30.53 mg/kg，虫酰肼对甜菜夜蛾卵的孵化率影响较小，而对孵化后幼虫的存活率影响较大。处理初孵幼虫6 d后，2种群幼虫存活率及化蛹率随处理浓度的增加而降低，幼虫历期最高饲毒浓度与最低饲毒浓度相比分别延长了2.71 d和6.19 d，同一浓度下，RR种群幼虫历期比SS种群缩短了0.94～2.59 d。处理甜菜夜蛾3龄幼虫12 h后，随虫酰肼浓度的增加，2种群化蛹率逐渐降低，雌雄蛹重均有递减的趋势，雌蛹比例随浓度的增加变化较小，但SS种群雌蛹比例≤50.00%，而RR种群雌蛹比例≥50.00%，雌雄成虫羽化率总体上依次递减，处理浓度大于1.00 mg/kg时虫酰肼对甜菜夜蛾成虫羽化的影响较大。

Effect of tebufenozide on growth and fecundity of the selected strain of Spodoptera exigua (Hübner) were studied. The results showed that the hatching IC₅₀ of SS and RR strains was 179.38 and 160.71 mg/kg, respectively, and larval survival IC₅₀ was 18.64 and 30.53 mg/kg, respectively. The influence of tebufenozide on egg hatching rate was less, while that on the larval survival rate was greater. After newly emerged larvae (1st instar) were treated with tebufenozide in 6 days, the larval survival rate and pupation rate decreased with the increasing of tebufenozide. The larva developmental duration increased 2.71 and 6.19 d respectively, when treated with highest and lowest of tebufenozide. Treated with same concentration, it decreased 0.94～2.59 d in RR strain than that in SS strain. When the 3rd instar larvae were treated with tebufenozide for 12 h in the two strains, the pupation rate and the average pupa weight decreased with the increasing of tebufenozide. The proportion of female pupae varied slightly, in which it was below 50% in SS strain while above 50% in RR strain. The emergence rate tended to decrease and the influence was greater when the treatment concentration was higher than 1.00 mg/kg.